Switching assembly of gas stove

Abstract

A switching assembly of a gas stove includes a regulating valve, a knob, a stop board, and a restricting device. The regulating valve has a valve member and a regulating member, which is rotatable to regulate a gas flow through the valve member. The knob is connected to an end of a shaft which is connected to the regulating member with an opposite end thereof, and therefore the regulating member can be rotated by turning the knob. The stop board is located between the valve member and the knob, wherein the stop board has a curved slot, which has a first stop portion and a second stop portion. The restricting member is movable in the curved slot and is restricted by the first or the second stop portions. When the restricting member touches the first stop portion, the switching assembly allows larger gas flow to flow through.

What is claimed is: 
     
       1. A switching assembly of a gas stove, comprising:
 a regulating valve having a valve member and a regulating member, wherein the regulating member is received in the valve member, and rotatable to regulate a gas flow through the valve member; 
 a shaft having an end connected to the regulating member; 
 a knob connected to an opposite end of the shaft to be turned to rotate the regulating member; 
 a stop board located between the valve member of the regulating valve and the knob, wherein the stop has a curved slot, which has a first stop portion, a second stop portion, and a third stop portion; and 
 a restricting device connected to the knob and engaged in the curved slot of the stop board, wherein the restricting device is movable in the curved slot either between the second stop portion and the third stop portion, or between the first stop portion and the third stop portion; 
 wherein the knob is turnable within a first internal if the restricting device is movable between the second stop portion and the third stop portion, and is turnable within a second internal if the restricting device is movable between the first stop portion and the third stop portion; 
 wherein when the knob is turnable within the second interval, a maximum gas flow which the regulating valve is able to supply is larger than that when the knob is turnable within the first interval. 
 
     
     
       2. The switching assembly of the gas stove of  claim 1 , wherein the first stop portion and the third stop portion are at opposite ends of the curved slot, and the second stop portion is between the first stop portion and the third stop portion. 
     
     
       3. The switching assembly of the gas stove of  claim 2 , wherein a protrusion is projected from a sidewall of the curved slot, and the second stop portion is formed on an end of the protrusion. 
     
     
       4. The switching assembly of the gas stove of  claim 2 , wherein a width of the curved slot between the third stop portion and the second stop portion is greater than that between the first stop portion and the second stop portion. 
     
     
       5. The switching assembly of the gas stove of  claim 1 , wherein the restricting device includes a first post and a second post; the first post is detachably connected to the knob, and the second post is fixedly connected to the knob; the second post is engaged in the curved slot of the stop board, and never touches the second stop portion when the knob is turned; when the first post is connected to the knob, the knob is turnable within the first interval, and the first post is movable between the third stop portion and the second stop portion along with the turned knob; when the first post is disconnected to the knob, the knob is turnable within the second interval, and the second post is movable between the third stop portion and the first stop portion along with the turned knob. 
     
     
       6. The switching assembly of the gas stove of  claim 5 , wherein the knob is provided with a tube, and the first post is inserted into or removed out of the tube. 
     
     
       7. The switching assembly of the gas stove of  claim 6 , wherein the first post is inherently formed on the knob when the knob is made, and is taken off from the knob to be inserted into the tube. 
     
     
       8. The switching assembly of the gas stove of  claim 1 , wherein the restricting device includes a post, a first tube, and a second tube on the knob; the post is alternatively inserted in the first tube or the second tube; when the post is inserted in the first tube, the knob is turnable within the first interval, and the post is movable between the third stop portion and the second stop portion along with the turned knob; when the first post is inserted in the second tube, the knob is turnable within the second interval, and the post is movable between the third stop portion and the first stop portion along with the turned knob. 
     
     
       9. The switching assembly of the gas stove of  claim 8 , wherein the post is inherently formed on the knob when the knob is made, and is taken off from the knob to be inserted into the first tube or the second tube.